Agentforce Innovator: Build Flex Prompt template

Have completed this task multipl times in multiple play grounds , yet when i verify this step it says  

We can’t find an experience named ’Family Karaoke Night’ with the experience type ’Family & Kids’ Activities’.

I can see it in my org the experiences. Please help

Also this step

8.Under Models, select OpenAI GPT 4

. ( This is not available , only OpenAI GPT4 omni mini is available if this right ??